Fountain marking brush



June; 16

E. c. BUEHRER FOUNTAIN MARKING BRUSH Filed July 25. 1923 mmvrox.

Patented June 16, 1925.

UNITED STATES EMIL Q BUEI-IRER, OF OAKLAND, CALIFORNIA.

FOUNTAIN MARKING BRUSH.

Application filed. July 23,

To all whom it may concern:

Be it known that I, EMIL'C. BUEHRER, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in a Fountain Marking Brush, of which the following is a specification and which is illustrated in the accompanying drawings.

My invention relates to improvements in a fountain marking brush of the type wherein the ink is supplied from a reservoir in the handle of the device, and as used by shippers and others in marking cases for shipment, also used by bulletin writers and certain classes of sign or show card work.

My improvement has for its principal object an improved ink feed for the marking point whereby a proper supply of "ink is at all times assured, and with positive control and overcoming the usual tendency ofv such brushes to leak either at the brush point or around it, or at the opposite end of the deviceand also provides for a choice of hair, felt, or other marking tips in the same brush Without altering the nozzle or changing the ink feeding system.

I attain the objects outlined above, as Well as others, by the fountain brush combination shown in the drawings accompanying this application and forming a part thereof, and in which Fig. 1 is an approximately full size view showing the outward appearance of my brush.

Fig. 2 is a longitudinal section of the same exposing the mechanism. Fig. 3 is a transverse section along the lines 3-3 of Fig. 2 showing the valve guide, and Fig. 4 a transverse section along the lines 4-4: of Fig. 2 showing the feed grooves in the nozzle.

Fig. 5 is a protective cap for slipping over the point when not in use, to guard it from accidentally soiling someone. The cap is shown with part broken away to reveal its section.

Fig. 6 is a hair or brush marking point interchangeable with the felt point shown in place in the device in Figures 1 and 2.

In further detail, the drawings reveal in Figure 1 a brush body 1' of elongated cylindrical form having a marking point 2 at the lower end and a valve control 3 at the other end.

In Figure 2, the longitudinal section, the

1923. Serial No. 653,387.

body 1 is seen to be hollow with a long valverod 4t centrally arranged and threaded at 5 through a fixed guide 6. This guide is a bridge piece open at both sides as shown in Fig. 3 to permit filling the hollow handle with ink when the lower nipple and nozzle are unscrewed. j

The bridge piece 6 is soldered or otherwise tightly secured within the body so it will not turn when the valve rod is turned for adjusting the valve from the outside control end 3.

The end 7 of the rod is formed into a needle valve seating in a hole 8 in the inverted nipple 9 screwed into the lower end of the bridge piece. The nipple has its free end threaded at 10 and anozzle 11 is screwed thereon.

The nozzle has a central threaded hole 1:2 preferably slightly tapering smaller toward the lower end and through which screws the marking point 2 of the brush. The point 2 isa long round piece of firm felt so that as. it wears it may be screwed out or the nozzle to present a proper length for use.

For the marking point this invention contemplates the interchangeable use of points made of felt,'soft or stiff hair, sponge, rolled cloth, or any other firm flexible capillary material, but I prefer the use of felt for the purpose as being most suitable for the greatest variety of uses.

Fig. 6 shows a point made of hair simply I bound at one end with gut or fine wire, the whole simply screwing through the nozzle the same as the felt point. Note that the hairs are uniform, no central hole being necessary for ink feeding purposes as is ordinarily the case.

Around the point, as shown in Fig. 2, in

the interiorly threaded hole of the nozzle is a series of small ink feeding channels 13 which lead from the space above the nozzle and terminate just inside the extreme end of the nozzle as shown.

Attention is here called to the fact that the upper end of the marking point extends into and is completely surrounded by an auxiliary ink reservoir or chamber let which is entirely separated from the main ink reservoir 15 within the body, when the valve 7 is seated.

At the upper end of the body is soldered or otherwise tightly secured, a nipple 16 screwed therein. The gland is loosely threaded into the nipple or it has a slightly flattened side, or the hole fitting the valve rod 4 is rather free so that when the gland is slightly unscrewed a small amount of air can work its way through any of these points to the air vent 1S drilled at an angle through the bottom of the fixed nipple and communicating with the main rcservoirspace 15.

The gland has a flange 19 tightly seating against the end of thefixed nipple when screwed down as shown. Between the gland and nipple surrounding the valve rod is a small amount of soft cotton or similar packing material 20. This cotton serves two purposes, one being to prevent leakage of ink past the rod 4 which is free to turn in the nipple and gland, and the other is'to act as an interruption to the free passage of air when the gland 19 is slightly unscrewed.

At first glance it mightbe thought that the packing 20 would stop off the air vent 18 entirely, but as it requires very little pressure on the packing to prevent ink leakage, when same is slightly relaxed the air will work through to the vent 18, especially as the vent is close to side of the threads as shown.

This restriction of the air vent by a fibrous material seems to solve the problem of such vents leaking ink, for it 'has been found in practice that it will not leak when turned over, even if the gland flange 19- is not screwed down tightly, for it should be noted that no air vent exists at the marking point 2 of the brush, as my feeding grooves 13 terminate just before the end of the nozzle 11.

I am aware of the several forms of fountain marking brushes now extant and am familiar with their shortcomings of improper feed and constant leakage, and which my invention described entirely overcomes, and it is to the improved features of feed and control to which my appended claims are drawn.

I claim 1. In a fountain marking brush, an ink reservoir, a tubular nozzle at one end, a capillzwy marking point extending from and projecting through said tubular nozzle into the reservoir, and a plurality of ink feeding grooves in the nozzle extending from the ink reservoir along side of the marking point and terminating before the extreme outer end of the nozzle.

2. In a fountain marking brush of the character described, an ink reservoir body,

an interiorly threaded tubular nozzle there on, .a capillary marking point screwed into said nozzle, and an ink feeding groove cut across the threads within the nozzle at the side of the marking point extending from the ink supply and terminating before the outermost thread in the nozzle.

EMIL C. BUEHRER. 

